Malicious PDF — malware analysis report

Static analysis result for SHA-256 096c6fc53190c02d…

MALICIOUS

PDF

72.9 KB Created: 2021-09-25 21:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f5429ad143e90fc2ba856a8a9a452bec SHA-1: 652ac196305258e0e19aaaf45037e50a8d266753 SHA-256: 096c6fc53190c02d20f2359847b7123b357e2bfd3c6247a046b861dee97e3e60
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt. The embedded URLs are likely intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2862

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=windows+10+pro+iso+english+64+bit PDF link annotation
    • https://mondoaudio.it/img/uploaded/file/52587407443.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/36635726764.pdfIn PDF document text
    • http://www.first-classlogistics.com/image/upload/File/91979873108.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/13088918653.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/bipigejudixekizew.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/gezejigu.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161462d1f62924---56246515614.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/rirotaw.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/fojelijezetusilezal.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/62181710241.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/zogujigumas.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/lulemononenanafigun.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/jubafilaranazoxupes.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/30116833332.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c7012a00e0e1491a6bb3f9c8dfd6c235/45077184776.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/38499705425.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a51a1e175---94717222876.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/zelefugimuweru.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/pedogepuzilodamowaj.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/fozujowijezerufe.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/5512303763.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/wokexizokovudajonutaliwex.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/44268531648.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/76662166330.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/72337939939.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ecab5f579---dogajezizogiziwibijatesef.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/laforopepopat.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA28 11148 bytes
SHA-256: 34b5f36e8a3b763a7c8aaf5db1fedb1cd8589c9a24abf2c7dc342ef6a389a0e0
font_01_sfnt_off0000d3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 19320 bytes
SHA-256: ee95d012e4abdde2d0921ea4a542a1fbfd121f125deb64152dbbbb6dc30d8b1b
font_02_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1